Individual skill

detecting-t1548-abuse-elevation-control-mechanism

Detect abuse of elevation control mechanisms including UAC bypass, sudo exploitation, and setuid/setgid manipulation by monitoring registry modifications, process elevation flags, and unusual parent-child process relationships.

internal/tools/skills/data/threat-hunting/detecting-t1548-abuse-elevation-control-mechanism/SKILL.md

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Nov 9, 2026
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Apache-2.0

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# Detecting T1548 Abuse Elevation Control Mechanism

## When to Use

- When hunting for privilege escalation via UAC bypass in Windows environments
- After threat intelligence indicates use of UAC bypass exploits by active threat groups
- When investigating how attackers achieved administrative access without triggering UAC prompts
- During security assessments to validate UAC bypass detection coverage
- When monitoring for setuid/setgid abuse on Linux systems

## Detection Gaps & Validation

- **No UAC consent event for fileless bypasses:** fodhelper/computerdefaults/sdclt/eventvwr produce no 4673/4674 — detection hinges on Sysmon EID 12/13 registry-set to `HKCU\Software\Classes\{ms-settings|mscfile|exefile}\shell\open\command` followed by EID 1 where the auto-elevate binary spawns cmd/powershell at High integrity. If registry auditing (EID 12/13) is missing from the Sysmon config, the bypass is silent.
- **Fileless / curver variants:** some bypasses use an empty `DelegateExecute` value or `CurVer` redirection that string-match rules on `ms-settings` miss; CMSTP (`/s /ni` + malicious INF) leaves an INF on disk, not a registry write.
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